GD32F107VF
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            CoreCortex-M3, 108 MHz 
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            FamilyGD32F10x Series 
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            Sub-FamilyGD32F107 
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          CMSIS PackGD32F10x_DFP
GD32F107 - ARM Cortex-M3 Core
  Frequency up to 108 MHz
  Single-cycle multiplier and hardware divider
  NVIC support 16 internal and 43 external interrupts, each interrupt has 16 priority levels
Flash memory
  Flash up to 1024 KB
  SRAM up to 96 KB
  2KB ISP loader ROM
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        Features Device GD32F107VF 
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          MemoryIRAM1 96 KiB IROM1 768 KiB